JPH046245A - Steel for building structure excellent in weatherability and fire resistance - Google Patents
Steel for building structure excellent in weatherability and fire resistanceInfo
- Publication number
- JPH046245A JPH046245A JP10745790A JP10745790A JPH046245A JP H046245 A JPH046245 A JP H046245A JP 10745790 A JP10745790 A JP 10745790A JP 10745790 A JP10745790 A JP 10745790A JP H046245 A JPH046245 A JP H046245A
- Authority
- JP
- Japan
- Prior art keywords
- steel
- strength
- weatherability
- fire resistance
- room temperature
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 47
- 239000010959 steel Substances 0.000 title claims abstract description 47
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 9
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 9
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 9
- 229910052802 copper Inorganic materials 0.000 claims abstract description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 7
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 6
- 229910052750 molybdenum Inorganic materials 0.000 claims abstract description 6
- 239000012535 impurity Substances 0.000 claims abstract description 5
- 229910052720 vanadium Inorganic materials 0.000 claims abstract description 3
- 239000000463 material Substances 0.000 claims description 16
- 230000009970 fire resistant effect Effects 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 229910052758 niobium Inorganic materials 0.000 abstract description 2
- 230000001105 regulatory effect Effects 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 10
- 239000010949 copper Substances 0.000 description 8
- 230000007423 decrease Effects 0.000 description 6
- 238000000576 coating method Methods 0.000 description 5
- 238000001816 cooling Methods 0.000 description 4
- 238000005260 corrosion Methods 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 238000005096 rolling process Methods 0.000 description 3
- 238000005275 alloying Methods 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000005098 hot rolling Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910000746 Structural steel Inorganic materials 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 238000009435 building construction Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000009749 continuous casting Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000004580 weight loss Effects 0.000 description 1
Landscapes
- Heat Treatment Of Steel (AREA)
Abstract
Description
【発明の詳細な説明】
〈産業上の利用分野〉
本発明は、建築構造物に使用される鋼材に係わるもので
、常温における強度、靭性および溶接性などはＪＴＳ規
格溶接構造用耐候性綱材（ＳＭＡ５０）と同等の特性値
を維持した上で高温での耐力の一層の向上を図ったもの
である。[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to steel materials used for building structures, and the strength, toughness, and weldability at room temperature meet the JTS standard weather-resistant steel for welded structures. This material maintains the same characteristic values as (SMA50) and further improves the yield strength at high temperatures.
〈従来の技術〉
屋外に設置する柱や梁などの建築構造用鋼材としては、
ＪＩＳＧ３１１４ｒ熔接構造用耐候性熱間圧延鋼材」な
どに規定されている鋼材が使用されているが、これらの
鋼材は３５０°Ｃ以上の高温になると著しく耐力が低下
するため、建築物に火災が発生しても鋼材の温度が３５
０°Ｃ以下になるよう耐火被覆を施すことが義務づけら
れている。このような耐火被覆の使用は施工コストを上
昇させるだけでなく、建築物のデザイン美観を損なう。<Conventional technology> Steel materials for architectural structures such as columns and beams installed outdoors are
Steel materials specified in JIS G3114r "Weather-resistant hot-rolled steel materials for welded structures" are used, but the strength of these steel materials decreases significantly when the temperature reaches 350°C or higher, which can cause fires in buildings. Even if the temperature of the steel material is 35
Fireproof coatings are required to keep temperatures below 0°C. The use of such fireproof coatings not only increases construction costs, but also detracts from the aesthetic design of the building.
耐火被覆の滅厚または無使用を可能とするため高温にお
いても高い耐力を有する鋼材が求められている。There is a need for steel materials that have high yield strength even at high temperatures in order to make it possible to reduce the thickness of fireproof coating or to use no fireproof coating.
しかしながら、従来の１ ／ ２ ＭＯ鋼、ｌＣｒ−１
／２Ｍｏ鋼などの高温用鋼は、高温での耐力は高いが、
常温での強度が高すぎ加工性に難点があるとともに、溶
接性も５ＭＡ３０綱などに比べて著しく劣るために、建
築構造物用には適用できない。However, the conventional 1/2 MO steel, lCr-1
/2 High-temperature steel such as Mo steel has high yield strength at high temperatures, but
It has too high strength at room temperature and has difficulty in workability, and its weldability is also significantly inferior to 5MA30 steel, so it cannot be used for building structures.
また、特公昭５６−３１８６７号公報、特開昭５７−１
４０８５５号公報、特開昭５７−１７４４３５号公報な
どに、上記ｌ／２Ｍｏ綱、ＩＣｒ １／２Ｍｏ鋼など
の合金元素量を低減して溶接性を改良した高温用鋼が示
されているが、これらの綱も建築構造物用耐火鋼として
は高温での耐力が十分とはいい難く、しかも常温強度が
高く、また、溶接性が劣るという欠点もある。Also, Japanese Patent Publication No. 56-31867, Japanese Patent Application Publication No. 57-1
40855, Japanese Patent Application Laid-open No. 57-174435, etc., disclose high-temperature steels with improved weldability by reducing the amount of alloying elements such as the above-mentioned 1/2Mo steel and ICr 1/2Mo steel. These steels also have the drawbacks of not having sufficient proof strength at high temperatures as fireproof steels for building structures, having high strength at room temperature, and having poor weldability.
〈発明が解決しようとする課題〉
本発明の目的は、従来の高温用低合金鋼に比べて溶接性
に優れ、また従来の溶接構造用耐候性鋼よりも高温強度
（特に降伏強さまたは耐力）が高く、かつ常温強度、靭
性、耐候性などは同等である経済的な建築構造物用耐候
性耐火鋼材を提供することにある。<Problems to be Solved by the Invention> The purpose of the present invention is to have superior weldability compared to conventional low-alloy steels for high temperature use, and to have better high-temperature strength (particularly yield strength or proof stress) than conventional weathering steels for welded structures. ), and has the same normal temperature strength, toughness, weather resistance, etc., and is economical.
く課題を解決するための手段〉
本発明者らは、上記目的を達成すべく鋼材の成分組成に
ついて鋭意検討した。その結果、Ｍｏを適正量添加した
うえで、Ｍｎ含有量を限定することにより高温での耐力
低下を抑制できること、及びＣｕ、 Ｃｒ、 Ｎｉなど
の含有で耐候性を維持できること、さらにＮｂ、■を微
量添加してＰＣＨの増大を抑えて常・高温の耐力が確保
できることの知見を得た。これにより、常温強度、靭性
、溶接性は従来の熔接耐耐候性構造用鋼と同等以上であ
って、しかも高温における耐力、例えば６００°Ｃにお
ける耐力が常温における耐力の６７％以上とすることが
できることを見出したものである。Means for Solving the Problems> In order to achieve the above object, the present inventors have intensively studied the composition of steel materials. As a result, it was found that by adding an appropriate amount of Mo and limiting the Mn content, it was possible to suppress the decline in yield strength at high temperatures, and that weather resistance could be maintained by containing Cu, Cr, Ni, etc., and that Nb, ■ We have found that by adding a small amount of PCH, it is possible to suppress the increase in PCH and ensure proof strength at normal and high temperatures. As a result, the strength, toughness, and weldability at room temperature are equivalent to or higher than those of conventional welded weather-resistant structural steel, and the yield strength at high temperatures, for example, at 600°C, is 67% or more of the yield strength at room temperature. This is what I found possible.
すなわち、本発明は、重量％にて、Ｃ：０．０３〜０．
１５％、Ｓｉ ： ０．０５〜０．７０％、Ｍｎ ：
０．１０〜０．８０％、Ｍ。That is, in the present invention, C: 0.03 to 0.03% by weight.
15%, Si: 0.05-0.70%, Mn:
0.10-0.80%, M.
： ０．２０−０．８０％、Ｃｕ ： ０．２０〜１．
００％、Ｃｒ ： ０．４０〜１．００％、Ｎｉ ：
０．０５〜０．５０％を含有し、残部がＦｅ及び不可避
的不純物よりなり、かつ下記に示す炭素当量（Ｃｅｑ）
が０．４５％以下であることを特徴とする建築構造用耐
候性耐大綱材であり、また、重量％にて、Ｃ： ０．０
３〜０．１５％、Ｓｉ ： ０．０５〜０．７０％、Ｍ
ｎ ： ０．１０−０゜８０％、Ｍｏ ： ０．２０−
０．８０％、Ｃｕ ： ０．２０〜１．００％、Ｃｒ；
０．４０〜１．００％、Ｎｉ ： ０．０５〜０．５０
％を含み、さらにＮｂ： ０．０４超〜０．１０％、Ｖ
： ０．００５〜０．１Ｏ％＋７）５ チカラ選ばれ
た１種以上を含有し、残部がＦｅ及び不可避的不純物よ
りなり、かつ下記に示す炭素当量（Ｃｅｑ ）が０．４
５％以下であることを特徴とする建築構造用耐候性耐火
鋼である。: 0.20-0.80%, Cu: 0.20-1.
00%, Cr: 0.40-1.00%, Ni:
Contains 0.05 to 0.50%, the remainder consists of Fe and unavoidable impurities, and has the carbon equivalent (Ceq) shown below.
It is a weather-resistant and rope-resistant material for architectural structures, characterized in that C: 0.45% or less, and C: 0.0% by weight.
3-0.15%, Si: 0.05-0.70%, M
n: 0.10-0°80%, Mo: 0.20-
0.80%, Cu: 0.20-1.00%, Cr;
0.40-1.00%, Ni: 0.05-0.50
%, and further includes Nb: more than 0.04 to 0.10%, V
: 0.005~0.1O%+7)5 Power Contains one or more selected types, the balance consists of Fe and unavoidable impurities, and the carbon equivalent (Ceq) shown below is 0.4
It is a weather-resistant and fire-resistant steel for building structures, characterized by having a content of 5% or less.
〈作 用〉
まず、この発明で、成分組成を上記の範囲に限定した理
由について説明する。<Function> First, the reason why the component composition is limited to the above range in this invention will be explained.
Ｃ： ０．０３〜０．１５ｗｔ％（以下単に％と表記）
Ｃは所定の強度を確保するために添加するが、０．０３
％未満では効果がなく、また０、 １５％を超えると溶
接性、靭性が阻害されるため、上限を０．１５％とし、
下限を０．０３％とした。C: 0.03 to 0.15wt% (hereinafter simply expressed as %)
C is added to ensure the specified strength, but 0.03
If it is less than 0.1%, there is no effect, and if it exceeds 0.15%, weldability and toughness will be impaired, so the upper limit is set at 0.15%.
The lower limit was set at 0.03%.
Ｓｉ ： ０．０５〜０．７０％
Ｓｊは製鋼時の脱酸剤及び強度向上元素として添加する
が、０．０５％未満ではその効果がなく、また０、７０
％を超えると靭性が著しく低下するので０，０５〜０，
７０％の範囲とした。Si: 0.05-0.70% Sj is added as a deoxidizing agent and strength-improving element during steel manufacturing, but if it is less than 0.05%, it has no effect, and if it is less than 0.05%, it has no effect.
If it exceeds 0.05 to 0.0%, the toughness will decrease significantly.
The range was set at 70%.
Ｍｎ ： ０．１０−０．８０％
Ｍｎは常温強度を確保するために０．１０％以上添加す
るが、Ｍｎの多ｆ添加は常温耐力の向上効果に比べ、高
温における耐力向上効果が小さく、溶接性も劣化させる
ので、ｈ量の上限を０．８０％とした。Mn: 0.10-0.80% Mn is added in an amount of 0.10% or more to ensure strength at room temperature, but the addition of a large amount of Mn has a smaller effect of improving yield strength at high temperatures than the effect of improving yield strength at room temperature. Since it also deteriorates weldability, the upper limit of the amount of h was set to 0.80%.
第１図に、６００℃における膝伏点または耐力と常温に
おけるそれとの比と、Ｍｎ量との関係を示す、同図から
明らかなように、Ｍｎが０．８０％を超えると高温にお
ける降伏点、耐力は常温強度に比べ急激に低下している
。Figure 1 shows the relationship between the ratio of kneeling point or yield strength at 600°C to that at room temperature and the amount of Mn.As is clear from the figure, when Mn exceeds 0.80%, the yield point at high temperature , the yield strength is rapidly decreasing compared to the strength at room temperature.
Ｍｏ ： ０．２０〜０．８０％
Ｍｏは高温強度の向上に著しく有効な元素であるが、０
．２０％未満ではその効果が少ないが、０．８０％を超
すと溶接性、靭性を劣化させるとともに経済的にも不利
となるため上限を０．８０％、下限を０．２０％とした
。Mo: 0.20-0.80% Mo is an element that is extremely effective in improving high-temperature strength, but 0.
．． If it is less than 20%, the effect will be small, but if it exceeds 0.80%, weldability and toughness will deteriorate and it will be economically disadvantageous, so the upper limit was set to 0.80% and the lower limit was set to 0.20%.
Ｃｕ ： ０．２（１−１，００％、Ｃｒ ： ０．４
０〜１．００％、Ｎｉ ： ０．０５〜０．５０％
Ｃｕ、 Ｃｒ、 Ｎｉは耐候性向上に有効な元素であり
、また強度向上にも有効な元素である。Ｃｕは０．２％
未満では、Ｃｒは０．４０％未満では、Ｎｉは０．０５
％未満ではこれらの効果が少ないのでこれを下限とした
。一方、Ｃｕは１％を超えると熱間加工性を劣化させる
ので上限を１．００％とした。 Ｃｒは溶接性の点から
上限を１．００％とした。Ｎｔは耐候性向上効果が０．
５０％以上では少なく、経済性の点から上限を０．５０
％とした。Cu: 0.2 (1-1,00%, Cr: 0.4
0 to 1.00%, Ni: 0.05 to 0.50% Cu, Cr, and Ni are elements effective in improving weather resistance and are also effective in improving strength. Cu is 0.2%
Cr is less than 0.40%, Ni is 0.05%
If it is less than %, these effects are small, so this was set as the lower limit. On the other hand, if Cu exceeds 1%, hot workability deteriorates, so the upper limit was set at 1.00%. The upper limit of Cr was set at 1.00% from the viewpoint of weldability. Nt has a weather resistance improvement effect of 0.
If it is more than 50%, it is small, and from the point of view of economy, the upper limit should be set at 0.50.
%.
Ｎｂ ： ０．０４超〜０．１０％
Ｎｂは常温及び高温強度の向上に有効であるが、０゜０
４％以下では、高温強度の上昇が少ないため０．０４％
超添加するが、０．１０％を超すと溶接性及び靭性が低
下するため上限を０．１０％とした。Nb: more than 0.04 to 0.10% Nb is effective in improving strength at room temperature and high temperature, but at 0°0
If it is 4% or less, the increase in high temperature strength is small, so 0.04%.
Although it is added in large quantities, if it exceeds 0.10%, weldability and toughness deteriorate, so the upper limit was set at 0.10%.
ｖ ： ０．００５〜ｏ、ｘｏ％
■は常温及び高温強度の向上に有効な元素であり、０．
００５％以上添加するが、０．１０％を超すと溶接性及
び靭性が低下するため上限を０．１０％とした。v: 0.005 to o, xo% (2) is an element effective in improving strength at room temperature and high temperature;
However, if it exceeds 0.10%, weldability and toughness deteriorate, so the upper limit was set at 0.10%.
上記各成分の限定範囲に加え、常温強度、溶接性をＪＩ
Ｓ規格溶接構造用耐候性５ＭＡ３０などと同程度とする
ため、炭素当量（Ｃｅｑ ）の上限を０．４５％とした
。In addition to the limited ranges of each component above, room temperature strength and weldability are
The upper limit of carbon equivalent (Ceq) was set to 0.45% in order to make the weather resistance similar to that of S standard welded structure 5MA30.
この発明鋼を製造するに当たっては、転炉または電気炉
で溶製し、ついで連続鋳造または造塊→分塊法によって
スラブとしたのち、厚板圧延あるいは条鋼圧延によって
銅板または形鋼とする方法がとりわけ有利に適合するが
、かような製造法だけに限定されるものではない。また
、圧延後の冷却は、放冷あるいは加速冷却を施すことが
できる。加速冷却によ恨合金元素量の低減が可能であり
、有利である。In producing the steel of this invention, it is melted in a converter or electric furnace, then made into a slab by continuous casting or ingot-blending method, and then made into copper plates or shaped steel by plate rolling or long bar rolling. Although it is particularly advantageously suited, it is not limited to such manufacturing methods. Further, cooling after rolling can be carried out by standing cooling or accelerated cooling. Accelerated cooling makes it possible to reduce the amount of alloying elements, which is advantageous.
〈実施例〉
第１表に示す成分組成の溶鋼から２００閣厚のスラブを
作製し、熱間圧延により４０〜８０ａｍの鋼板とし、室
温まで放冷したもの及び熱間圧延後６００°Ｃまで加速
冷却し、その後放冷したものにフいて、常温及び６００
°Ｃでの引張特性、０°Ｃにおける母材及び入熱５０ｋ
Ｊ／ｃ＋ａの溶接ボンド部の靭性大気暴露試験（工業地
帯１年間）による腐食減量を第２表に示す。<Example> Slabs with a thickness of 200 mm were produced from molten steel having the composition shown in Table 1, and steel plates with a thickness of 40 to 80 am were produced by hot rolling, and the slabs were left to cool to room temperature and accelerated to 600°C after hot rolling. Cooled, then left to cool, then dried at room temperature and 600℃.
Tensile properties at °C, base material at 0 °C and heat input 50k
Table 2 shows the corrosion weight loss of the welded bond part of J/c+a in the toughness atmospheric exposure test (in an industrial area for 1 year).
第１表中Ａ−Ｃ，綱が本発明鋼、Ｈ−に鋼が比較鋼であ
る。ＨＥは通常の溶接構造用圧延鋼材５Ｍ５０で、腐食
減量が多く、高温での耐力低下が著しい。Ｈ鋼板外はＣ
ｕ、 Ｃｒ （Ｎｉ）を含有しており、腐食減量は少な
く良好な耐候性を備えている。■鋼は通常の溶接構造用
耐候性鋼材５ＭＡ３０で、高温での耐力が著しく低下し
ている。In Table 1, steels A-C are the steels of the present invention, and steels H- are comparative steels. HE is a 5M50 rolled steel material for normal welded structures, which has a large amount of corrosion loss and a significant decrease in yield strength at high temperatures. Outside the H steel plate is C
It contains u, Cr (Ni), has little corrosion loss and has good weather resistance. ■The steel is 5MA30 weather-resistant steel for normal welded structures, and its yield strength at high temperatures is significantly reduced.
Ｊｊｍｌは本発明の成分範囲からＭｎ量の上限を超えて
いるもので、高温での耐力低下が大きい。Ｋ綱は本発明
のＣｅｑの上限を超えているもので、高温強度は十分で
あるが、常温強度が過度に高く、溶接性が劣っている。Jjml exceeds the upper limit of the Mn content within the component range of the present invention, and the yield strength decreases significantly at high temperatures. Steel K exceeds the upper limit of Ceq of the present invention, and has sufficient high temperature strength, but has excessively high room temperature strength and poor weldability.
これに対し、本発明鋼のＡ−Ｃ鋼は耐候性に優れ、高温
での耐力低下も小さく、溶接ボンド部の靭性も良好で、
建築構造物用耐候性耐火材として優れた鋼である。On the other hand, the A-C steel of the present invention has excellent weather resistance, a small decrease in yield strength at high temperatures, and good toughness of the weld bond.
This steel is excellent as a weather-resistant and fire-resistant material for building structures.
〈発明の効果〉
本発明鋼は屋外の建築構造物に使用される鋼材として、
常温強度、靭性、溶接性は従来の溶接構造用耐候性圧延
鋼材と同等であって、しかも高温における耐力低下が小
さく、従来鋼の３５０°Ｃまでの許容応力を６００°Ｃ
まで上昇させることができるようになり、耐火被覆の減
少など建築物の施工上極めて高い効果が得られる。<Effects of the Invention> The steel of the present invention can be used as a steel material for outdoor building structures.
The room temperature strength, toughness, and weldability are equivalent to conventional weather-resistant rolled steel materials for welded structures, and the drop in yield strength at high temperatures is small, with the allowable stress of conventional steel up to 350°C being lower than that of 600°C.
It is now possible to raise the temperature to a maximum of 100%, which has extremely high effects on building construction, such as reducing the need for fireproof coatings.
第１図は６００℃における耐力と常温における耐力の比
に及ぼすＭｎ量の影響を示すグラフである。FIG. 1 is a graph showing the influence of the amount of Mn on the ratio of the yield strength at 600° C. and the yield strength at room temperature.
Claims (1)
％、Ｍｎ：０．１０〜０．８０％、Ｍｏ：０．２０〜０
．８０％、Ｃｕ：０．２０〜１．００％、Ｃｒ：０．４
０〜１．００％、Ｎｉ：０．０５〜０．５０％ を含有し、残部がＦｅ及び不可避的不純物よりなり、か
つ下記に示す炭素当量（Ｃｅｑ）が０．４５％以下であ
ることを特徴とする建築構造用耐候性耐火鋼材。 Ｃｅｑ＝Ｃ＋Ｓｉ／２４＋Ｍｎ／６＋Ｃｒ／５＋Ｎｉ／
４＋Ｍｏ／４＋Ｖ／１４Ｃ２、重量％にて、 Ｃ：０．０３〜０．１５％、Ｓｉ：０．０５〜０．７０
％、Ｍｎ：０．１０〜０．８０％、Ｍｏ：０．２０〜０
．８０％、Ｃｕ：０．２０〜１．００％、Ｃｒ：０．４
０〜１．００％、Ｎｉ：０．０５〜０．５０％を含み、
さらにＮｂ：０．０４超〜０．１０％、Ｖ：０．００５
〜０．１０％のうちから選ばれた１種以上を含有し、残
部がＦｅ及び不可避的不純物よりなり、かつ下記に示す
炭素当量（Ｃｅｑ）が０．４５％以下であることを特徴
とする建築構造用耐候性耐火鋼。 Ｃｅｑ＝Ｃ＋Ｓｉ／２４＋Ｍｎ／６＋Ｃｒ／５＋Ｎｉ／
４＋Ｍｏ／４＋Ｖ／１４[Claims] 1. In weight%: C: 0.03 to 0.15%, Si: 0.05 to 0.70
%, Mn: 0.10-0.80%, Mo: 0.20-0
．． 80%, Cu: 0.20-1.00%, Cr: 0.4
0 to 1.00%, Ni: 0.05 to 0.50%, the balance consists of Fe and unavoidable impurities, and the carbon equivalent (Ceq) shown below is 0.45% or less. Characteristic weather-resistant and fire-resistant steel materials for architectural structures. Ceq=C+Si/24+Mn/6+Cr/5+Ni/
4+Mo/4+V/14C2, in weight%, C: 0.03 to 0.15%, Si: 0.05 to 0.70
%, Mn: 0.10-0.80%, Mo: 0.20-0
．． 80%, Cu: 0.20-1.00%, Cr: 0.4
0 to 1.00%, Ni: 0.05 to 0.50%,
Furthermore, Nb: more than 0.04 to 0.10%, V: 0.005
-0.10%, the balance is Fe and unavoidable impurities, and the carbon equivalent (Ceq) shown below is 0.45% or less. Weather-resistant fire-resistant steel for building structures. Ceq=C+Si/24+Mn/6+Cr/5+Ni/
4+Mo/4+V/14
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10745790A JP2907942B2 (en) | 1990-04-25 | 1990-04-25 | Steel materials for building structures with excellent weather resistance and fire resistance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10745790A JP2907942B2 (en) | 1990-04-25 | 1990-04-25 | Steel materials for building structures with excellent weather resistance and fire resistance |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH046245A true JPH046245A (en) | 1992-01-10 |
| JP2907942B2 JP2907942B2 (en) | 1999-06-21 |
Family
ID=14459657
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10745790A Expired - Fee Related JP2907942B2 (en) | 1990-04-25 | 1990-04-25 | Steel materials for building structures with excellent weather resistance and fire resistance |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2907942B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006118011A (en) * | 2004-10-22 | 2006-05-11 | Sumitomo Metal Ind Ltd | Steel having excellent seaside weather resistance and structure |
| CN103774787A (en) * | 2014-01-22 | 2014-05-07 | 百安力钢结构应用科技有限公司 | Structural thin-walled cold-bending component |
| CN109680205A (en) * | 2019-03-04 | 2019-04-26 | 徐超 | A kind of preparation method of boiler material |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102560256B (en) * | 2012-02-29 | 2013-12-25 | 江苏省沙钢钢铁研究院有限公司 | Fire-resistant weather-resistant steel with excellent low-temperature toughness and preparation process thereof |
-
1990
- 1990-04-25 JP JP10745790A patent/JP2907942B2/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006118011A (en) * | 2004-10-22 | 2006-05-11 | Sumitomo Metal Ind Ltd | Steel having excellent seaside weather resistance and structure |
| JP4586489B2 (en) * | 2004-10-22 | 2010-11-24 | 住友金属工業株式会社 | Steel and structures with excellent beach weather resistance |
| CN103774787A (en) * | 2014-01-22 | 2014-05-07 | 百安力钢结构应用科技有限公司 | Structural thin-walled cold-bending component |
| CN109680205A (en) * | 2019-03-04 | 2019-04-26 | 徐超 | A kind of preparation method of boiler material |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2907942B2 (en) | 1999-06-21 |
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